JPH0387823U - - Google Patents

Info

Publication number
JPH0387823U
JPH0387823U JP1989146451U JP14645189U JPH0387823U JP H0387823 U JPH0387823 U JP H0387823U JP 1989146451 U JP1989146451 U JP 1989146451U JP 14645189 U JP14645189 U JP 14645189U JP H0387823 U JPH0387823 U JP H0387823U
Authority
JP
Japan
Prior art keywords
fuel
reflecting surface
fuel reflecting
cavity
injected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1989146451U
Other languages
Japanese (ja)
Other versions
JP2501886Y2 (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1989146451U priority Critical patent/JP2501886Y2/en
Priority to DE4033822A priority patent/DE4033822C2/en
Publication of JPH0387823U publication Critical patent/JPH0387823U/ja
Application granted granted Critical
Publication of JP2501886Y2 publication Critical patent/JP2501886Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0648—Means or methods to improve the spray dispersion, evaporation or ignition
    • F02B23/0651—Means or methods to improve the spray dispersion, evaporation or ignition the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
    • F02B23/0621—Squish flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例を適用したデイーゼ
ル機関のピストンの頂面図、第２図は本発明によ
るデイーゼル機関の側面断面図、第３図は第２図
の拡大側面断面図、第４図は第１図の−線に
沿つてみた要部拡大断面図、第５図は第１図の
−線に沿つてみた要部拡大断面図、第６図は第
４図の−線に沿つてみた拡大断面図、第７図
は燃焼方法を説明するための図、第８図は燃料反
射位置を変化させた場合の機関回転数とトルクの
関係を示す線図、第９図は機関回転数と全負荷ト
ルクとの関係を示す線図、第１０図はアイドル運
転時におけるＮＯｘ排出量とパテイキユレート排
出量およびＨＣ排出用との関係を示す線図、第１
１図は旋回流の強さとトルクとの関係を示す線図
、第１２図は別の実施例のピストンの頂面図であ
る。 ２……ピストン、５……燃料噴射弁、６……キ
ヤビテイ、６ａ……キヤビテイ周壁面、７ｂ……
燃料反射面、２０……凹部。 FIG. 1 is a top view of a piston of a diesel engine to which an embodiment of the present invention is applied, FIG. 2 is a side sectional view of the diesel engine according to the present invention, and FIG. 3 is an enlarged side sectional view of FIG. Figure 4 is an enlarged sectional view of the main part taken along the - line in Figure 1, Figure 5 is an enlarged sectional view of the main part taken along the - line in Figure 1, and Figure 6 is an enlarged sectional view of the main part taken along the - line in Figure 4. Fig. 7 is a diagram for explaining the combustion method, Fig. 8 is a diagram showing the relationship between engine speed and torque when changing the fuel reflection position, and Fig. 9 is a diagram showing the relationship between engine speed and torque when the fuel reflection position is changed. Figure 10 is a diagram showing the relationship between rotation speed and full load torque; Figure 10 is a diagram showing the relationship between NOx emissions, particulate emissions, and HC emissions during idling;
FIG. 1 is a diagram showing the relationship between the strength of swirling flow and torque, and FIG. 12 is a top view of a piston of another embodiment. 2...Piston, 5...Fuel injection valve, 6...Cavity, 6a...Cavity surrounding wall surface, 7b...
Fuel reflecting surface, 20... recess.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ピストン頂面に形成されたキヤビテイ内周壁面
上に該キヤビテイ内周壁面に沿つて環状に延びる
燃料反射面を形成すると共に該燃料反射面を下向
きの断面凹状の湾曲面から形成して燃料噴射弁か
ら前記燃料反射面に向けて燃料を噴射させ、前記
燃料反射面の形成位置および断面形状を前記燃料
反射面において反射した噴射燃料が、前記燃料反
射面上での燃料反射位置が上方から下方に向かう
に従つてキヤビテイ周辺部からキヤビテイ中心部
に向かうように定め、上方に向かうに従つて深さ
が深くなる凹部を前記燃料反射面上に形成した直
噴式デイーゼル機関の燃焼室。 A fuel injection valve is provided by forming a fuel reflecting surface extending annularly along the cavity inner peripheral wall surface formed on the top surface of the piston, and forming the fuel reflecting surface from a curved surface having a downward concave cross section. The injected fuel is injected toward the fuel reflecting surface from above, and the injected fuel is reflected at the fuel reflecting surface at the formation position and cross-sectional shape of the fuel reflecting surface, so that the fuel reflecting position on the fuel reflecting surface is from above to below. A combustion chamber for a direct-injection diesel engine, wherein a recess is formed on the fuel reflecting surface so as to extend from the periphery of the cavity toward the center of the cavity, and to increase in depth toward the top.
JP1989146451U 1989-12-21 1989-12-21 Combustion chamber of direct injection diesel engine Expired - Lifetime JP2501886Y2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1989146451U JP2501886Y2 (en) 1989-12-21 1989-12-21 Combustion chamber of direct injection diesel engine
DE4033822A DE4033822C2 (en) 1989-12-21 1990-10-24 Combustion chamber of a diesel engine with direct injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989146451U JP2501886Y2 (en) 1989-12-21 1989-12-21 Combustion chamber of direct injection diesel engine

Publications (2)

Publication Number Publication Date
JPH0387823U true JPH0387823U (en) 1991-09-06
JP2501886Y2 JP2501886Y2 (en) 1996-06-19

Family

ID=15407938

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989146451U Expired - Lifetime JP2501886Y2 (en) 1989-12-21 1989-12-21 Combustion chamber of direct injection diesel engine

Country Status (2)

Country Link
JP (1) JP2501886Y2 (en)
DE (1) DE4033822C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10261181A1 (en) * 2002-12-20 2004-07-01 Daimlerchrysler Ag Internal combustion engine with auto-ignition
US6997158B1 (en) * 2004-10-07 2006-02-14 International Engine Intellectual Property Company, Llc Diesel combustion chamber
FR2886982A1 (en) * 2005-06-09 2006-12-15 Renault Sas Combustion chamber for diesel engine with direct injection has piston face cavity with notches in cavity rim aligned with injector orifices

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032929A (en) * 1983-08-03 1985-02-20 Yanmar Diesel Engine Co Ltd Combustion chamber of direct-injection type internal- combustion engine
JPH01190915A (en) * 1988-01-27 1989-08-01 Toyota Motor Corp Combustion chamber of direct injection type diesel engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2753341A1 (en) * 1977-11-30 1979-05-31 Daimler Benz Ag Compression ignition IC engine - has trough in piston with recess for each injector jet in wall
GB8317453D0 (en) * 1983-06-28 1983-08-03 Massey Ferguson Perkins Ltd Ic engine
EP0295520B1 (en) * 1987-06-08 1992-08-26 Toyota Jidosha Kabushiki Kaisha Combustion chamber in a direct injection type diesel engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032929A (en) * 1983-08-03 1985-02-20 Yanmar Diesel Engine Co Ltd Combustion chamber of direct-injection type internal- combustion engine
JPH01190915A (en) * 1988-01-27 1989-08-01 Toyota Motor Corp Combustion chamber of direct injection type diesel engine

Also Published As

Publication number Publication date
JP2501886Y2 (en) 1996-06-19
DE4033822A1 (en) 1991-06-27
DE4033822C2 (en) 1995-06-01

Similar Documents

Publication Publication Date Title
US6997158B1 (en) Diesel combustion chamber
US6945210B2 (en) Combustion chamber with one concave surface and three convex surfaces
US6868817B2 (en) Simplified combustion chamber
JPH0387823U (en)
JPH0214423U (en)
JPH01124039U (en)
JPH0263072U (en)
JPS6247728U (en)
JPH0188026U (en)
JPH0280724U (en)
JPH0612197Y2 (en) Combustion chamber of internal combustion engine
JPS6197532U (en)
JPH0228526U (en)
JPS62135U (en)
JPH0285827U (en)
JPH01119829U (en)
JPH0212027U (en)
JPS6279934U (en)
JPH02144622U (en)
JPH0220722U (en)
JPH01119828U (en)
JPH01149529U (en)
JPH04132431U (en) Piston for internal combustion engine
JPH02118133U (en)
JPH0264722U (en)